Sadie and Jude's 17-year-old son Rafferty walked the catwalk for DKNY in June

Frost also has her hands full with her four children - Finlay, 24, from her marriage to Spandau Ballet's Gary Kemp, and Rafferty, 17, Iris, 14 and 12-year-old Rudy, her children with ex-husband Jude Law.

"It’s all down to organisation," she says, of life as a working mum. "I get quite fanatical about what time we leave for the school run. I’m happy most of the time, but sometimes it gets too much."

She reveals she sometimes tussles with her teenage daughter over what to wear. "My daughter Iris is into fashion and has a strong mind about what she likes. I’ve said no a couple of times but it’s difficult when you think about what I wore at her age."

Meanwhile Rafferty already looks set to follow his mum into modelling, after he took to the catwalk for DKNY in June.

"He’s doing his A-levels and is in a band called Dirty Harrys," says Frost. "They’ve got opportunities but you've got to be careful. It can be too distracting. I grew up acting and modelling and you don’t get the education you should."

Photos: Rex Features

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